JavaScript DataView.getFloat32() Method

Below is the example of the dataView.getFloat32() Method.

  • Example:
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    <script> 
        var buffer = new ArrayBuffer(20); 
        var dataview1 = new DataView(buffer, 0, 10); 
        dataview1.setFloat32(1, 12.01); 
        document.write(dataview1.getFloat32(1) + "<br>"); 
    </script> 

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  • Output:

    12.010000228881836
    

    • 



The dataView.getFloat32() is an inbuilt function in dataView which is used to get a 32-bit float at the specified location i.e, at byte offset from the start of the dataView. The range of 32-bit floating-point number is form -3.4E+38 to +3.4E+38


Syntax:


dataView.getFloat32(byteOffset)


Parameters: It has parameter byteOffset which is offset in a byte and it says where to read the data from the beginning(start) of the view.


Return value: It returns 32-bit signed float number.




Example 1:


Input: dataview1.setFloat32(1, 56.34);
Output: 56.34000015258789



Example 2:


Input: dataview1.setFloat32(1, Math.PI);
Output: 3.1415927410125732



JavaScript code to show the working of this method:

Code #1: 











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<script> 


  


    // Creating buffer with size in byte 


    var buffer = new ArrayBuffer(20); 


  


    // Creating a view 


    var dataview1 = new DataView(buffer, 0, 10); 


  


    // put the data 56.34 at slot 1 


    dataview1.setFloat32(1, 56.34); 


    document.write(dataview1.getFloat32(1) + "<br>"); 


  


</script> 



















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Output:


56.34000015258789


Code #2: Not only float value but also a math function like Math.PI can be taken as the parameter of the function.











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<script> 


  


    // Creating buffer with size in byte 


    var buffer = new ArrayBuffer(20); 


  


    // Creating a view with slot from o to 10 


    var dataview1 = new DataView(buffer, 0, 10); 


  


    // put the value of PI at slot 1 


    dataview1.setFloat32(1, Math.PI); 


    document.write(dataview1.getFloat32(1) + "<br>"); 


  


</script> 



















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Output:


3.1415927410125732


Code #3: When there is no data to be stored, then it returns NaN i.e, not a number.











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<script> 


  


    // Creating buffer with size in byte 


    var buffer = new ArrayBuffer(20); 


  


    // Creating a view 


    var dataview1 = new DataView(buffer, 0, 10); 


  


    // putting no data at slot 1 


    dataview1.setFloat32(1); 


    document.write(dataview1.getFloat32(1) + "<br>"); 


  


</script> 



















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Output:


NaN


Supported Browsers: 


    

  • Google Chrome
    • 

  • Firefox
    • 

  • Apple Safari
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  • Opera
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